CN218998331U - Non-dimming non-isolation LED driving power supply - Google Patents
Non-dimming non-isolation LED driving power supply Download PDFInfo
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- CN218998331U CN218998331U CN202123331265.4U CN202123331265U CN218998331U CN 218998331 U CN218998331 U CN 218998331U CN 202123331265 U CN202123331265 U CN 202123331265U CN 218998331 U CN218998331 U CN 218998331U
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Abstract
The utility model discloses a non-dimming non-isolation LED driving power supply, which is characterized in that: the LED power supply comprises an alternating current filter circuit connected with an external power supply, wherein a rectifier is connected to the output end of the filter circuit, a constant current driving chip U1 is connected to the output end of the rectifier, a voltage conversion circuit is connected to the constant current driving chip U1, a direct current filter circuit is connected to the output end of the voltage conversion circuit, the output end of the direct current filter circuit is connected with the positive electrode of an LED wiring port, the negative electrode of the LED wiring port is grounded, and the negative electrode output end of the rectifier is grounded. The utility model aims to overcome the defects in the prior art and provide the non-dimming non-isolation LED driving power supply which has the advantages of simple structure, wide voltage input support, high efficiency and no stroboscopic effect.
Description
Technical Field
The utility model relates to the field of driving power supplies, in particular to a non-dimming non-isolation LED driving power supply.
Background
The LED light source has the advantages of environmental protection, energy saving, long service life, low driving voltage and the like, and is recognized as the most promising illumination light source in the twenty-first century. Due to the limitation of cost, lamp volume, EMI interference and other factors, in recent years, linear driving modes are mostly adopted for small and medium power LED lighting lamps, such as bulb lamps, light pipes, ceiling lamps, spot lamps and the like.
The traditional linear driving circuit with the capacitor filter LED mainly comprises a FUSE tube FUSE, a piezoresistor VR, a bridge rectifier BR, a filter capacitor C, a series LED chip set, an LED working current sampling resistor Rs, a current amplifier CA, a reference voltage source Vref, an adjusting tube Q, a bias circuit and the like. Although such a linear drive circuit has the advantages of few components, low cost and small EMI, it can only be operated in power supply situations where the ac input voltage does not vary by more than 5%, and it is obvious that the range of use is severely limited.
Therefore, the existing non-dimming non-isolated LED driving power supply needs to be further improved.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide the non-dimming non-isolation LED driving power supply which has the advantages of simple structure, wide voltage input support, high efficiency and no stroboscopic effect.
In order to achieve the above purpose, the present utility model adopts the following scheme:
the utility model provides a non-isolated LED drive power supply of non-dimming which characterized in that: the LED power supply comprises an alternating current filter circuit connected with an external power supply, wherein a rectifier is connected to the output end of the filter circuit, a constant current driving chip U1 is connected to the output end of the rectifier, a voltage conversion circuit is connected to the constant current driving chip U1, a direct current filter circuit is connected to the output end of the voltage conversion circuit, the output end of the direct current filter circuit is connected with the positive electrode of an LED wiring port, the negative electrode of the LED wiring port is grounded, and the negative electrode output end of the rectifier is grounded.
As another improvement of the non-dimming non-isolation LED driving power supply, the voltage conversion circuit comprises a field effect transistor Q1, wherein a grid electrode of the field effect transistor Q1 is connected with a GATE electrode of a constant current driving chip U1, a drain electrode of the field effect transistor Q1 is connected with an anode of an output end of a rectifier, a source electrode of the field effect transistor Q1 is connected with a diode D1 in series and then grounded, and a resistor R7 is arranged between the grid electrode and the source electrode of the field effect transistor Q1.
As another improvement of the non-dimming non-isolation LED driving power supply, the direct current filter circuit comprises an inductor L2, wherein the input end of the inductor L2 is connected with a resistor RS2 in series and then is connected to a CS pin of a constant current driving chip U1, a resistor RS1 is connected to two ends of the resistor RS2 in parallel, a capacitor C8 and a resistor R6 are respectively connected between the input end of the inductor L2 and a FB pin of the constant current driving chip U1 in parallel, a resistor R4 is connected between the output end of the inductor L2 and the FB pin of the constant current driving chip U1 in series, and the output end of the inductor L2 is connected with the positive electrode of an LED wiring port.
As another improvement of the non-dimming non-isolation LED driving power supply, the positive output end of the rectifier is connected with the resistor R1 and the resistor R2 in series and then is connected to the VCC pin of the constant current driving chip U1, the capacitor C2 is connected between the VCC pin and the GND pin of the constant current driving chip U1 in series, the capacitor C4 is connected between the COMP pin and the GND pin of the constant current driving chip U1 in series, and the diode D2, the resistor R9 and the resistor R3 are connected between the VCC pin of the constant current driving chip U1 and the positive electrode of the LED wiring port in series in sequence.
As another improvement of the non-dimming non-isolation LED driving power supply, a capacitor C7 is connected between the positive electrode and the negative electrode of the LED wiring port, and two ends of the capacitor C7 are connected with a resistor R8 in parallel.
As another improvement of the non-dimming non-isolation LED driving power supply, a fuse F1 is arranged between the positive electrode of the external power supply and the positive electrode input end of the alternating current filter circuit.
As another improvement of the non-dimming non-isolation LED driving power supply, the alternating current filter circuit comprises an inductor L1 connected in series on the positive electrode of an external power supply, a capacitor C1 is connected in parallel between the input end of the inductor L1 and the negative electrode of the external power supply, a capacitor C5 is connected in parallel between the output end of the inductor L1 and the negative electrode of the external power supply, and a resistor R5 is connected in parallel between the two ends of the inductor L1.
As another improvement of the non-dimming non-isolated LED driving power supply of the present utility model, the rectifier is a full-wave bridge rectifier.
As another improvement of the non-dimming non-isolation LED driving power supply, a voltage dependent resistor VR1 is connected between the positive electrode and the negative electrode of an external power supply.
In summary, compared with the prior art, the utility model has the following beneficial effects:
the utility model has simple structure, supports wide voltage input, and has high efficiency and no stroboscopic effect.
Drawings
Fig. 1 is a schematic diagram of the present utility model.
Description of the embodiments
The above and further technical features and advantages of the present utility model are described in more detail below with reference to the accompanying drawings.
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
As shown in FIG. 1, the non-dimming non-isolation LED driving power supply comprises an alternating current filter circuit connected with an external power supply, wherein a rectifier is connected to the output end of the filter circuit, a constant current driving chip U1 is connected to the output end of the rectifier, a voltage conversion circuit is connected to the constant current driving chip U1, a direct current filter circuit is connected to the output end of the voltage conversion circuit, the output end of the direct current filter circuit is connected with the positive electrode of an LED wiring port, the negative electrode of the LED wiring port is grounded, and the negative electrode output end of the rectifier is grounded.
According to the utility model, the external alternating current power supply has the voltage of AC90-264V and 50-60Hz, the voltage is filtered by the alternating current filter circuit and becomes smooth alternating current, the smooth alternating current is rectified by the rectifier and becomes direct current, the direct current is supplied to the constant current driving chip U1 after passing through the resistors R1 and R2, the constant current driving chip U1 is converted into proper output voltage of 60-75V and 0.25A by the voltage conversion circuit, and then the smooth direct current is changed into the smooth direct current by the direct current filter circuit, so that the load LED connected to the LED wiring port is more stable and free of stroboscopic.
The voltage conversion circuit comprises a field effect transistor Q1, wherein a grid electrode of the field effect transistor Q1 is connected with a GATE electrode of a constant current driving chip U1, a drain electrode of the field effect transistor Q1 is connected with an anode of an output end of a rectifier, a source electrode of the field effect transistor Q1 is connected with a diode D1 in series and then grounded, and a resistor R7 is arranged between the grid electrode and the source electrode of the field effect transistor Q1. According to the utility model, different input voltages can be converted into proper output voltages by the voltage conversion circuit formed by the field effect transistor Q1, the resistor R7 and the like, so that the input voltage range is wide, and the application range is wide.
The direct current filter circuit comprises an inductor L2, wherein the input end of the inductor L2 is connected with a resistor RS2 in series and then is connected to a CS pin of a constant current driving chip U1, the resistor RS1 is connected to two ends of the resistor RS2 in parallel, a capacitor C8 and a resistor R6 are respectively connected between the input end of the inductor L2 and a FB pin of the constant current driving chip U1 in parallel, a resistor R4 is connected between the output end of the inductor L2 and the FB pin of the constant current driving chip U1 in series, and the output end of the inductor L2 is connected with the positive electrode of an LED wiring port. According to the utility model, the direct current filter circuit formed by the inductor L2, the capacitor C8, the resistor R6 and the like can convert the circuit output from the constant current driving chip U1 into smooth direct current, so that the LED lamp connected to the LED port works more efficiently and stably without stroboscopic.
The positive electrode output end of the rectifier is connected with a resistor R1 and a resistor R2 in series and then is connected to a VCC pin of a constant current driving chip U1, a capacitor C2 is connected between the VCC pin and a GND pin of the constant current driving chip U1 in series, a capacitor C4 is connected between a COMP pin and the GND pin of the constant current driving chip U1 in series, and a diode D2, a resistor R9 and a resistor R3 are connected between the VCC pin of the constant current driving chip U1 and the positive electrode of an LED wiring port in series.
According to the LED wiring port, the capacitor C7 is connected between the positive electrode and the negative electrode of the LED wiring port, and the resistor R8 is connected at two ends of the capacitor C7 in parallel.
The utility model is provided with a fuse F1 between the positive electrode of the external power supply and the positive input end of the alternating current filter circuit. The fuse F1 of the utility model can play a role of short-circuit protection.
The alternating current filter circuit comprises an inductor L1 connected in series on the positive electrode of an external power supply, a capacitor C1 is connected in parallel between the input end of the inductor L1 and the negative electrode of the external power supply, a capacitor C5 is connected in parallel between the output end of the inductor L1 and the negative electrode of the external power supply, and a resistor R5 is connected in parallel between the two ends of the inductor L1.
The rectifier of the utility model is a full-wave bridge rectifier.
The voltage dependent resistor VR1 is connected between the positive electrode and the negative electrode of an external power supply. The voltage dependent resistor VR1 can play a role in lightning protection.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a non-isolated LED drive power supply of non-dimming which characterized in that: the LED power supply comprises an alternating current filter circuit connected with an external power supply, wherein a rectifier is connected to the output end of the filter circuit, a constant current driving chip U1 is connected to the output end of the rectifier, a voltage conversion circuit is connected to the constant current driving chip U1, a direct current filter circuit is connected to the output end of the voltage conversion circuit, the output end of the direct current filter circuit is connected with the positive electrode of an LED wiring port, the negative electrode of the LED wiring port is grounded, and the negative electrode output end of the rectifier is grounded.
2. The non-dimming non-isolated LED drive power supply of claim 1, wherein: the voltage conversion circuit comprises a field effect transistor Q1, wherein a grid electrode of the field effect transistor Q1 is connected with a GATE electrode of the constant current driving chip U1, a drain electrode of the field effect transistor Q1 is connected with an anode of an output end of the rectifier, a source electrode of the field effect transistor Q1 is connected with a diode D1 in series and then grounded, and a resistor R7 is arranged between the grid electrode and the source electrode of the field effect transistor Q1.
3. The non-dimming non-isolated LED drive power supply of claim 1, wherein: the direct current filter circuit comprises an inductor L2, wherein the input end of the inductor L2 is connected with a resistor RS2 in series and then is connected to a CS pin of a constant current driving chip U1, the resistor RS1 is connected to two ends of the resistor RS2 in parallel, a capacitor C8 and a resistor R6 are respectively connected between the input end of the inductor L2 and a FB pin of the constant current driving chip U1 in parallel, a resistor R4 is connected between the output end of the inductor L2 and the FB pin of the constant current driving chip U1 in series, and the output end of the inductor L2 is connected with the positive electrode of an LED wiring port.
4. The non-dimming non-isolated LED drive power supply of claim 1, wherein: the positive electrode output end of the rectifier is connected with a resistor R1 and a resistor R2 in series and then is connected to a VCC pin of a constant current driving chip U1, a capacitor C2 is connected between the VCC pin and a GND pin of the constant current driving chip U1 in series, a capacitor C4 is connected between a COMP pin and a GND pin of the constant current driving chip U1 in series, and a diode D2, a resistor R9 and a resistor R3 are connected between the VCC pin of the constant current driving chip U1 and the positive electrode of an LED wiring port in series.
5. The non-dimming non-isolated LED driving power supply of claim 4, wherein: a capacitor C7 is connected between the positive electrode and the negative electrode of the LED wiring port, and two ends of the capacitor C7 are connected with a resistor R8 in parallel.
6. The non-dimming non-isolated LED drive power supply of claim 1, wherein: and a fuse F1 is arranged between the positive electrode of the external power supply and the positive input end of the alternating current filter circuit.
7. The non-dimming non-isolated LED drive power supply of claim 1, wherein: the alternating current filter circuit comprises an inductor L1 connected in series to the positive electrode of an external power supply, a capacitor C1 is connected in parallel between the input end of the inductor L1 and the negative electrode of the external power supply, a capacitor C5 is connected in parallel between the output end of the inductor L1 and the negative electrode of the external power supply, and a resistor R5 is connected in parallel between the two ends of the inductor L1.
8. The non-dimming non-isolated LED drive power supply of claim 1, wherein: the rectifier is a full wave bridge rectifier.
9. The non-dimming non-isolated LED drive power supply of claim 1, wherein: a varistor VR1 is connected between the positive and negative poles of the external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331265.4U CN218998331U (en) | 2021-12-28 | 2021-12-28 | Non-dimming non-isolation LED driving power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331265.4U CN218998331U (en) | 2021-12-28 | 2021-12-28 | Non-dimming non-isolation LED driving power supply |
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| Publication Number | Publication Date |
|---|---|
| CN218998331U true CN218998331U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123331265.4U Active CN218998331U (en) | 2021-12-28 | 2021-12-28 | Non-dimming non-isolation LED driving power supply |
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| CN (1) | CN218998331U (en) |
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- 2021-12-28 CN CN202123331265.4U patent/CN218998331U/en active Active
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